So the installer did those A-pillars? I joined a car audio forum not long ago and can't believe the craftsmanship that some of those guys put in to a-pillars. Especially when they put a 3.5" mid there! That sub box is awesome...if I elect to get a sub, I'll probably do something similar. Where is your amp(s)?
Yup, Rick at Creative Audio Werks in Phoenix did this work. The tweeter is behind that speaker cloth in the a-pillar. The amp is on top of the sub-box underneath the rear deck.